Rotary blower support



1952 E. J. LATTNER ROTARY BLOWER SUPPORT 2 SHEETSSHEET 2 Filed June 10, 1948 INVENTOR. fMEPT J. L Arr/v5? ATTORNEY Patented Oct. 28, 1952 ROTARY BLOWER SUPPORT Emert J. Lattner, Cedar Rapids, Iowa, assignor to Century Engineering-Corporation, a corporation of Iowa Application J une10, 1948;Serial No. 32,218 I 3 Claims. ((11.230-132) This invention relates to heating apparatus and has particular relation to gun type oil burners. i I

It has long been common practice in'the art of gun type oil burner design to assemble all of the component parts, including such functional major parts as the electric motor, the fuel pump, the fan and fan housing, drive coupling. the ignition transformer and blast tube, into one compact rigid unit, and then mount this assembly, through the medium of a mounting flange or other means, directly to the furnace or boiler fire box plate or access door.

It is well known to the industry that vibration or other mechanical sounds emanating from the rotating mechanism, such as the magnetic hum of the electric motor or the pulsating hydraulic sounds of the oil pump or. the pulse beat of the fan, are transmitted to the furnace or boiler and then carried over the ducts r pipes throughout the building and amplified many times over the original noise volume, creating objectionable noise.

It is one of themajor objects of my invention to materially limit, in a heating system, the noise produced by the moving parts of an oil burner.

Another objectof my invention is to provide means for'insulating one portion of an oil burner from another portion and to separate' 'or insulate that portion of an oil burner which contains the moving parts from the remaining portion in which the parts are stationary.

Another object of'my invention is to provide means, in an oil burner structure, for breaking up and counteracting vibration from the portion of the oil burner containing the moving parts.

Another'ob'jectof my invention is to provide a floating or suspension system for mounting the motor and thepump and other parts in an oil burner. I

Still anotherobject of my invention is to provide a resilient mounting. for the motor and other moving parts of an oil burner, such that the weight of theseparts is suspended by resilient and sound-deadening means capable of-adjustment to regulate the transverse and verticalmovement of the motor and other parts on the base portion of the burner.

Another object of my invention is to provide a sound-deadening or sound damping structure comprised of a plurality of units, one or more of which is designed to permit movement in a transverse direction to a greater extent than in a vertical direction, another unit of which: is

designed to control movement in a different direction, and a third unit of which is designed purely for sound deadening purposes.

A still further object of my invention is to provide means for isolating that portion of a gun type .oil burner which creates vibration and objectionable noises from that portion of the burner which contains no moving parts but which is used as an air conduit, blast tube, or mounting flange, so as to provide a rigid andsecure mounting to the boiler or furnace orother supporting structure, but to provide an isolated, resilient mounting of the mechanical, functional parts. I

Other and further features and objects of the invention will be more apparent to those skilled in the art upon a consideration of the accompanying drawings and following specifications, wherein is disclosed a single exemplary embodimentof the invention, with the understanding, however, that such changes may be made therein as fall within the scope of the appended claims, without departing from: the spirit of the invention.

L In said drawings: I

Figure l is, a view in perspective of a furnace adapted for oil burning, in which the oil burner is flang mounted on the front of the furnace.

Figure 2 is a view in perspective illustrating the oil burner as mounted on a separate supporting member with the blast tube projecting into the furnace. This mounting is'used most frequently with the so-called conversion type of oil burner. a

Figure 3 is afragmentary view in longitudinal section of the rear end of the-oil burner blast tube, illustrating diagrammatically how the various vibrations and movements, of theporti on of the burner which houses the rotating parts, are directed in different planes and brokenup so that the resultant vibration and undesirable noise is prevented from being transmitted to the base portion of the burner and to the furnace. 7

Figure 4 is a view in exploded relation of burner constructed according to one embodiment of my invention and illustrating the manner in which the dampening means is incorporated in the burner structure. i

Figure 5 illustrates one element of the vibration dampening structure. f I

Figure 6 illustrates another element, and Figure 7 illustrates, in enlarged'detail, a sec tion of the main vibration insulating, member.

Referring now to the drawings:

In practicing my invention, in one embodiment thereof, I divide the conventional oil burner into at least two assemblies, one assembly including the moving parts such as the motor [0, the fan or blower I housed in the scroll housing II, the pump [2, and the coupling (not shown), for coupling the motor, fan, and the pump, and the second or base assembly including the air conduit l4, blast tube [6, mounting flange l1, ignition transformer l8, and the electrode and nozzle assembly. This base assembly may be rigidly attached to the fire box plate or access door (Fig. 1), or mounted on a suitable supporting standard (Fig. 2).

I then provide a substantially rectangular gasket 2| of soft resilient rubber or neoprene or the like and preferably H-shaped in cross section, as illustrated in Figure '7, so that the upper flange 22 of the air conduit 14 and the lower flange III of the scroll of the fan ll may be received within the lower and upper grooves respectively of this sound-deadening gasket H.

The dividing line between the motor assembly and the base assembly is not in a strictly horizontal plane, but it is to be noted that the ends 22! and 222 of the flanged portion 22 of the base assembly are raised above the side portions 223 of the flange.

I also provide a triangular tongue-like member 34 so positioned as to project up inside. the scroll I l and this member is reinforced by a boss 32 and rib 33, the curved plate portion 34 being adapted to form a part or continuation of the scroll. The rear end of the air conduit 14 is provided with an opening 36 which is closed by a removable door 35 so as to permit access into the air conduit I4 for removal of the electrode and nozzle assembly.

I wish to break up any movement or vibration of the upper housing or assembly and propose to accomplish this by restricting a portion of the assembly to a greater degree in one plane than in another, and to restrict movement of another portion of the upper assembly to a greater degree in still another plane.

This is accomplished, in one embodiment of the invention, by the additional mounting elements illustrated in Figures 5 and 6. A lip 41., which is apart of the upper housing I I, and a continuation of the scroll, projects below the rear end portion of flange I H of that member, and this lip portion is drilled andthreaded as illustrated at 42. A flange 43 is provided with the rear end of the housing [4 and this flange slopes inwardly and downwardly from the rear wall thereof and is drilled to receive a bolt 44 and a cylindrical washer or snubber 46 of rubber or other resilient material. The head of the bolt 44 may be reached through the access opening 36: so that when the upper assembly is in place on the lower assembly, the bolt 44 may be inserted and threaded into the opening 42 and the bolt tightened until the resilient member 46 is expanded sufiiciently to cause it to be firmly engaged within the hole in the flange 43 in which it is received.

Movement of the upper assembly in a horizontal or vertical direction will result in movement to a greater degree in the inclined direction, indicated by the arrow 41 (Figs. 3: and 5 than in any other direction, because the cylindrical member 46 may slip longitudinally to a greater or less degree within the opening in the flange 43, while movement in another direction will result in compression of the member 46, with consequent limiting of the movement by reason of the shearing action set up.

flange [H of the housing H.

The upwardly projecting flange 3|, illustrated in Figure 6, projects above the lower edge of flange ll of the upper assembly, and this flange 3| is drilled, as at 5|, to receive the bolt 52 which has threaded engagement therewith. The bolt 52 is provided with another cylindrical resilient snubber member 53 received in a suitable cylindrical hole within the forward portion of the In this case also, the bolt is tightened only until the washer-like snubber 53 is snugly engaged within the cylindrical hole in flange I ll, so that movement of this part of the assembly in any direction results in greater horizontal movement than in vertical movement, as illustrated by the arrow 56. Thus the action of vibration or movement of the upper assembly is broken up into movement in different planes at different parts of the assembly so that a rocking motion results rather than a simple motion of translation, either in a vertical or a horizontal'plane. The elements, illustrated in Figures 5 and 6 help to support the upper assembly on the lower assembly so that the gasket 2| carries only a portion of the load and is, therefore, more effective in deadening vibration and sound emanating from the motor assembly. I

The frictional engagement or skin tension of the washer-like members 46 and 53 in the openings of their respective mounts may be regulated by tightening or loosening their respective mounting bolts 44 and 52, to thus regulate the amplitude and degree of movement of the attached parts, as desired, to further control and break up vibration.

Although I have described a specific embodiment of my invention, it is apparent that modi flcations thereof may be made by'those skilled in the art. Such modifications may be made without departing from the spirit and scope of my invention as set forth in the appended claims.

I claim as my invention:

1. In a fluid fuel burner having an air conduit and a demountable blower housing, with rotatable blower, adapted to be mounted thereon, a resilient gasket disposed between theair conduit and blower housing and adapted to provide a substantially air-tight seal and sound isolating means therebetween, and means for securing the demountable blower housing to the airconduit comprising a plurality of resilient snubbers, each of said snubbers having a mounting member extending therethrough in non-parallel relation with other of said mounting members. i

2. In a device of the character described having a base assembly including an air conduit and a vibration-creating assembly including a blower housing, a resilient gasket-like member disposed between the air conduit and the blower housing for sound isolating purposes, and other means for breaking up and changing the direction of vibratory forces set up byv the vibration-creating assembly, said other means comprising directional, snubber-like members operatively disposed between the base and vibration-creating assemblies, certain of said snubber-like members being adapted and arranged to dampe vibrations to a greater degree from one direction than from other directions. and; other of, said snubberlike members being operatively disposedat an angle to the first of said snubber-like members to further dampen vibrations not completely controlled by said first snubber-like members.

3'. In a device, of the character described having a supporting structure including an air con.-

duit, and a demountable structure includin a blower housing and carrying vibration causing elements, means for isolating vibration from the supporting structure and for breaking up and redirecting vibratory forces set up by the vibration causing elements, said means comprising a resilient gasket disposed between the air conduit and the blower housing, a pair of generally cylindrical, resilient snubbers, each disposed generally between the supporting structure and the demountable structure with the longitudinal axes thereof arranged in angular relation, means adjustably securing the snubbers in position including portions of one of said structures having apertures for receiving the said resilient snubbers, and adjustment members adjustable to compress the snubbers within the apertures, the said adjustment members being secured to the other of said structures.

EMERT J. LA'I'INER.

6 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name 2 Date 1,089,748 Clark Mar. 10, 1914 1,973,187 Van Sciver Sept. 11, 1934 2,019,052 Lord Oct. 29, 1935 2,032,909 Braden Mar. 3, 1936 2,039,309 French May 5, 1936 2,239,068 Wood Apr. 22, 1941 2,355,631 Carter Aug. 15, 1944 2,406,601 Fyler Aug. 27, 1946 2,425,566 Robinson Aug. 12, 1947 2,457,058 Markowitz Dec. 21, 1948 

